TITLE:
TITLE: Unconsolidated Unconsolidated Undrained Triaxial TestUndrained Triaxial Test
OBJECTIVE OBJECTIVE
To determine the shear strength parameters for clayey soil. To determine the shear strength parameters for clayey soil.
THEORETICAL BACKGROUND THEORETICAL BACKGROUND
Triaxial test is more reliable because we can measure both drained and undrainedTriaxial test is more reliable because we can measure both drained and undrained shear strength.
shear strength.
Generally 1.4” diameter (3” tall or !."” diameter (#” tall specimen is used.Generally 1.4” diameter (3” tall or !."” diameter (#” tall specimen is used.
$pecimen is encased by a thin rubber membrane and set into a plastic cylindrical$pecimen is encased by a thin rubber membrane and set into a plastic cylindrical chamber.
chamber.
%ell pressure is applied in the chamber (which represent%ell pressure is applied in the chamber (which represent σ σ 33 ' '
by pressuri&ing the cell by pressuri&ing the cell fluid (generally water.
fluid (generally water.
''eertical rtical stress is increased by loastress is increased by loading the specimding the specimen (by raising the plateen (by raising the platen in strainn in strain co
contntrorollelled d tetest st anand d by by adaddiding ng loload ad didirecrectly tly in in strstress ess cocontntrorolllled ed testest t bubut t strstrainain controlled test is more common until shear failure occurs. Total )ertical stress which controlled test is more common until shear failure occurs. Total )ertical stress which is
is σ σ 11 ' '
is e*ual to the sum is e*ual to the sum σ σ 33
' '
and de)iator stress (
and de)iator stress ( σ σ dd ..
+e+easuasuremremenent t of of (( σ σ dd axaxiaial l dedefoformrmatiationon popore re prpresessusure re anand d samsamplple e )o)olulumeme
changed are recorded. changed are recorded.
,epending on the nature of loading and drainage condition triaxial tests are conducted,epending on the nature of loading and drainage condition triaxial tests are conducted in three different ways.
in three different ways.
•
• UU Triaxial testUU Triaxial test •
• %U Triaxial test%U Triaxial test •
• %, Triaxial test%, Triaxial test
UU test measures the undrained shear strength of soils by means of axial compressionUU test measures the undrained shear strength of soils by means of axial compression test on cylindrical specimens in which no drainage is permitted during the test.
test on cylindrical specimens in which no drainage is permitted during the test.
APPARATUS APPARATUS
a)
a) $train controlled triaxial load frame$train controlled triaxial load frame b)
b) Triaxial cell assemblyTriaxial cell assembly c)
c) %ell pressure supply panel%ell pressure supply panel d)
d) $cale$cale e)
e) -alance sensiti)e .1 g-alance sensiti)e .1 g f)
f) +oisture cans+oisture cans g
PROCEDURE PROCEDURE
1.
1. The dThe diameteriameter le length ngth and inand initial mitial mass of thass of the specime specimen meaen measured.sured. !.
!. ThThe thice thic0ne0ness of thss of the rube rubber mber membembranrane mease measureured.d. 3.
3. $oi$oil spel specimcimen is sen is set in a tet in a triaxriaxial chial chambamberer.. 4.
4. The celThe cell pressul pressure increare increased to a desed to a desired )asired )alue ( 0lue ( 02a for th2a for the first case ane first case and 14 0d 14 02a in2a in the second case.
the second case. .
. The spThe specimen secimen sheared aheared at the rate ot the rate of 15mf 15min or .in or .5min 5min (for (for mm sampmm sample heigle height.ht. 6n automated de)ice the software calculates it automatically based on the soil type. 6n automated de)ice the software calculates it automatically based on the soil type. #
#.. TThhee
∆
∆
7 and7 and σ σ dd recorded in e)ery 1 seconds (computer does it automatically. recorded in e)ery 1 seconds (computer does it automatically..
. The teThe test continst continued untued until the de)il the de)iator streiator stress showss shows ultimas ultimate )alue ote )alue or ! axr ! axial strainial strain.. ".
". 8ft8fter the test comer the test completplete the cell prese the cell pressure relsure release to the presease to the pressursure )ent and the celle )ent and the cell bring down
bring down by bring by bring the the the the lower platen lower platen down the down the cell cell drained and drained and the porous the porous stonestone clean and assembly.
clean and assembly. 9.
9. ThThe moe mode ode of faf failuilure tre then hen s0es0etchtch.. 1.
1. The weight of The weight of specimen measured again and thspecimen measured again and the specimen put into e specimen put into the o)en.the o)en. 11
11.. The weighThe weight measured again after !4 hourt measured again after !4 hour.. 1!.
1!. The test repeated using seconThe test repeated using second specimen(1d specimen(14 02a of 4 02a of cell pressure and third specimecell pressure and third specimenn !1 02a of cell pressure.
!1 02a of cell pressure.
USER’S GUIDELINE FOR THE ELE TRIAXIAL DEVICE UU TRIAXIAL TEST) USER’S GUIDELINE FOR THE ELE TRIAXIAL DEVICE UU TRIAXIAL TEST)
A!
A! PO"ER PO"ER AND AND #AIN #AIN SUPPLSUPPL$ $ SETTINGS SETTINGS T%&' T%&' '(e &' '(e &' a*+ead, a*+ead, d-.e)d-.e) 1.
1. 2ress the :22ress the :2ower ,isower ,isplay” poplay” power buttwer button to the :/on to the :/;” posit;” position. ion. 8ft8fter $tabiler $tabili&atioi&ationn (approx. 1 min. push the :Tare” button to &ero the
(approx. 1 min. push the :Tare” button to &ero the display.display. !.
!. TuTurn on the labrn on the laboratory )oratory )acuum suacuum supplypply. Th. The associatee associated amound amount of )acuum a)t of )acuum a)ailableailable to your system will
to your system will be displayed on the :'acube displayed on the :'acuum $upply Gauge”.um $upply Gauge”. 3.
3. TuTurn on rn on the laborthe laboratoatory comprery compressed air ssed air supsupplyply. 'i. 'iewiewing the ng the :2r:2ressessure $uppure $upply”ly” gauge ad<ust the :+aster =egulator” until the desired maximum supply pressure is gauge ad<ust the :+aster =egulator” until the desired maximum supply pressure is reached. The display pressure should be about 1 psi more than the re*uired cell reached. The display pressure should be about 1 psi more than the re*uired cell pressure.
pressure. D- N-( e/ceed 012 '& 0234 KPa) +e''5+e!D- N-( e/ceed 012 '& 0234 KPa) +e''5+e! 4.
4. TuTurn on rn on the lthe laboaboratoratory wary water suter supplpplyy.. B!
B! FILLING OF FILLING OF THE DE6AITHE DE6AIRED "RED "AATER TER TATANK S$STE#NK S$STE# T%&' '(e &' a*+ead, d-.e)
T%&' '(e &' a*+ead, d-.e) 1.
1. TuTurn the :,rn the :,e>8irie>8iring ?ng ?ateater %ontrr %ontrol” )al)ol” )al)e to he :@ie to he :@ill” posill” position.tion. !.
!. ?h?hen the en the tatan0 watn0 water er lele)e)el l is abois about 1” ut 1” frfrom topom top tuturn the :,e>rn the :,e>8i8irinring g ??aateter r %ontrol” )al)e to the :
%ontrol” )al)e to the :)ent” position ( 'e)ent” position ( 'ery $lowly to allow ry $lowly to allow water to drain.water to drain.
C!
C! DE6AIRING DE6AIRING THE "THE "AATER TER TATANK NK T%&' '(T%&' '(e &' e &' a*+ead, a*+ead, d-.e)d-.e) 1.
1. TuTurn the :,e>8irn the :,e>8iring ?ring ?ateater %ontrolr %ontrol” )al)e to the :'” )al)e to the :'aacuum” pocuum” positionsition.. !.
/cciasionally to enhance the remo)al or air from water. /cciasionally to enhance the remo)al or air from water. 3.
3. TuTurn the :,rn the :,e>8irie>8iring ?ng ?ateater %ontrr %ontrol” )al)ol” )al)e to the )ee to the )ent posint position.tion.
D!
D! FILLING FILLING THE BURETHE BURETTE CHANNELTTE CHANNELS S T%&' '(T%&' '(e a*+e a*+ead, d-ead, d-.e)!.e)! 1.
1. $et al$et all fi)e l fi)e )al)e)al)es on s on the tethe test cell st cell to he to he closed closed positposition.ion. !.
!. $et the :,$et the :,e>8irie>8iring ?ng ?ater %ater %ontrolontrol” )al)e to ” )al)e to the :2rethe :2ressure” possure” positionsition.. 3.
3. $et the :-$et the :-urette5urette58nnul8nnulus 6npuus 6nput %ontt %ontrol” )alrol” )al)e to the :))e to the :)ent” poent” positionsition.. 4.
4. $et th$et the :8nnue :8nnulus %olus %ontrol ntrol $witch$witch” to the ” to the :open:open” posi” position (;tion (;ormalormal.. .
. $lowly $lowly turn thturn the :-urete :-urette58nnte58nnulus 6nulus 6nput %oput %ontrolntrol” )al)e to t” )al)e to the :@illhe :@ill” positi” position.on. ?h
?hen en ththe e wawateter r reareachches es ththe e dedesirsired ed lele)el)el tuturn rn ththe e :-:-ururetette5te58n8nnunululus s @l@lowow %ontrol” )al)e to the :%ell /perate” position. ,o not o)erfill. ?ater should not be %ontrol” )al)e to the :%ell /perate” position. ,o not o)erfill. ?ater should not be allowed to flow into the cell pressure tube at the top.
allowed to flow into the cell pressure tube at the top. #.
#. =e=epepeat the at the ababo)o)e e ststepeps s ununtitil l twtwo o buburetrette chante channenels beinls being g usused are ed are fifiileiled d to theto the desired le)el.
desired le)el. ;ote A 6f
;ote A 6f the water the water le)el in le)el in the :,e>8ired the :,e>8ired ?a?ater Tan0 $ystem” drops to about ter Tan0 $ystem” drops to about 1” from1” from the bottom repeat the filling and de>airing procedures described abo)e.
the bottom repeat the filling and de>airing procedures described abo)e. E!
E! DE6ADE6AIRING TIRING THE BURETHE BURETTE CHANTE CHANNELS TNELS T%&' &' a*+%&' &' a*+ead, d-ead, d-.e)!.e)! 1.
1. $et the :-ur$et the :-uretteette58n58nnulnulus 6npuus 6nput %ontrt %ontrol” )al)ol” )al)e e for each chanfor each channel to the nel to the :)a:)acuucuum”m” position.
position. Under Under normal normal operating operating conditions conditions the the de>airing de>airing process process should should bebe complete in
complete in about about >1 m>1 minutes.inutes. !.
!. 8fter com8fter completiopletion set all :6n set all :6nput %onput %ontrol” )ntrol” )al)es bal)es bac0 to thac0 to the :)ent” pe :)ent” positioosition.n.
F
F!! PREPPREPARARATATION ION OF OF THE THE SA#PSA#PLELE 1.
1. TrTrim thim the sampe sample to ble to be teste tested used using a +ing a +iteiter -oxr -ox.. !.
!. +e+easuasure the heigre the height and diamht and diameteter of er of ththe e samsamplple e at )ariat )ariouous s lolocatcatioion n to get anto get an a)erage )alue.
a)erage )alue. 3.
3. +easure +easure the the weight weight of tof the trhe trimmed immed sample sample beforbefore test.e test. 4.
4. ?r?rap the sap the sample iample in a plan a plastic shestic sheeting teting to pre)o pre)ent any ent any moistmoisture losure loss.s. .
. Use trimUse trimmings tmings to get to get the mohe moisture coisture content ontent of the samf the sample befople before test.re test.
G!
G! PREPPREPARAARATION TION FOR THE FOR THE TRIAXIAL TRIAXIAL LOADINGLOADING 1.
1. ,oub,ouble clle clic0 oic0 on son software ftware icon icon :,$” :,$” on on the dthe des0topes0top.. !.
!. %li%lic0 oc0 on thn the bue buttotton :;n :;ew Tew Teest”.st”. 3.
3. $elect $elect : UU1 : UU1 BTBTriaxiriaxial Cuial Cuic0 unc0 undrainedrained Td Test>est>8$”.8$”. 4.
.
. @ill in th@ill in the spaces in the spaces in this windois window and clic0 w and clic0 on the buon the button :otton :o0” to the ri0” to the right sighght sight of t of the screen. The fields mar0ed D by their side can not be left blan0 and characters the screen. The fields mar0ed D by their side can not be left blan0 and characters 5D.AEFH can not be used while filling up the spaces.
5D.AEFH can not be used while filling up the spaces. #.
#. 6n the w6n the window indow :Te:Test in 2rogst in 2rogress” ma0ress” ma0e sure the sure that you seat you select the tlect the test that yest that you wantou want to run and then clic0 on the button :o0” at the bottom of the screen.
to run and then clic0 on the button :o0” at the bottom of the screen. .
. $witch $witch on thon the 7oad e 7oad %ell ma%ell machine uchine using thsing the butte button at thon at the bac0e bac0..
H!
H! #O#ONITNITORORING TING THE THE TESTEST
1.
1. 6n the :T6n the :Test +oest +onitornitoring” wiing” windowndow ma0e su ma0e sure that all thre that all the test data shoe test data shown in the uppwn in the upper boxer box is correct.
is correct. !.
!. %lic0 o%lic0 on the bun the button :$ttton :$tart Tart Test $test $tage” loage” located to cated to the uppthe upper riger right side of ht side of the screthe screen.en. 3.
3. 6n the nex6n the next window selet window select :Tct :Test 6nest 6nitiali&itiali&ationation” and clic0 o” and clic0 on button :/n button :/I” in the bottoI” in the bottom.m. 4.
4. 6n the :Te6n the :Test 6nitialst 6nitiali&ationi&ation” window” window enter th enter the pre)ioe pre)iously measuusly measured samplred sample ,iametee ,iameterr ?eight and Jeight.
?eight and Jeight. .
. The buThe bul0 densil0 density of the samty of the sample will bple will be calcue calculated aulated automatomatically by tically by the softhe softwaretware.. #.
#. The infoThe informatiormation regardn regarding the +eming the +embrane Thbrane Thic0nesic0ness and Ks and Kooungs +oduungs +odulus are defaulus are defaultlt )alue and may not be
)alue and may not be changed unless using a changed unless using a different 0ind of membrane around thedifferent 0ind of membrane around the sample.
sample. .
. 8fter e8fter enterinntering all dg all data clata clic0 on tic0 on the grehe green buten button :%ton :%onfironfirm $etup m $etup ,ata”.,ata”. ".
". This wiThis will brinll bring yog you bac0 tu bac0 to the :o the :TeTest +onist +onitoring toring ?i?indow”ndow”.. 9.
9. 8gain cl8gain clic0 on butic0 on button ”$tarton ”$tart Tet Test $tage” lost $tage” located to thcated to the upper rie upper right side of thght side of the screene screen.. 1.
1. This time select :%ompression” This time select :%ompression” from the menu anfrom the menu and then clic0 on d then clic0 on button :/I” at thebutton :/I” at the bottom of the window
bottom of the window..
I!
I! CCO#O#PRPRESESSISION ON STSTAAGEGE
@rom the pre)ious stage you will be directed to the screen titled :%ompression $tage for @rom the pre)ious stage you will be directed to the screen titled :%ompression $tage for Undrained Test”.
Undrained Test”. 6.
6. ''eent nt %el%ell 2rl 2ressuessure re TrTransansducducer er to to 8tm8tmospospherhere ae and nd =es=esetAetA a
a $et th$et the :-uree :-urette58ntte58nnulus 6nulus 6nput nput %ontro%ontrol” )al)l” )al)e to the to the :2resse :2ressure” 2oure” 2ositionsition.. b
b $et the :8nnulus %ontrol $witch” )al)e to the :on” position$et the :8nnulus %ontrol $witch” )al)e to the :on” position.. c
c $et the :$et the :-uret-urette58nnte58nnulus @loulus @low %ontrw %ontrol” )alol” )al)e to the )e to the :%ell /p:%ell /perate” perate” positioosition.n. d
d +a0e sur+a0e sure all the cell pe all the cell pressurressure transde transducer is opeucer is open to atmospn to atmosphere and where and wait for 1 seait for 1 secondsconds e
e 6n the ,6n the ,$> soft$> software winware windowdow cli clic0 on the rc0 on the red buted button :=ton :=eset %ell 2eset %ell 2ressurressure”.e”.
66.
66. @ill @ill and and 2ressurise 2ressurise the the %ell. %ell. $elect $elect +aterial +aterial TyType pe and and 2ress 2ress -utton -utton to to %alculate %alculate $uggested$uggested =ate of $train on Lnter ,irectlyA
=ate of $train on Lnter ,irectlyA a
a %lo%lose thse the )ae )al)e ol)e on thn the tese test :+at :+ar0er0ed %2”d %2”.. b
b %arefully place the sample on the T%arefully place the sample on the Triaxial cell base pedestal.riaxial cell base pedestal. c
c 2lace th2lace the top pree top pressure passure pad and use bd and use blac0 />rlac0 />rings to seings to secure thcure the membre membrane aroane around the bund the basease pedestal and top pressure pad.
pedestal and top pressure pad. d
e
e /pen th/pen the 0nob at e 0nob at the top othe top of cylinf cylinder and der and attach tattach the tube mhe tube mar0ed :%ar0ed :%2” to the 0n2” to the 0nob 0nobob 0nob mar0ed :?a
mar0ed :?ater” located at the ter” located at the bottom left of the bottom left of the panel. /pen the )al)e on panel. /pen the )al)e on the test cellthe test cell mar0ed :%2”. This will gradually fill
mar0ed :%2”. This will gradually fill the cell. %ontrol the flow the cell. %ontrol the flow using the )al)e mar0ed %2.using the )al)e mar0ed %2. f
f %lose t%lose the 0nohe 0nob at thb at the top oe top of the gf the glass cylass cylinder linder when twhen the cell he cell is fillis filled with ed with waterwater.. g
g ,etach t,etach the tube mahe tube mar0ed :%2r0ed :%2” from the 0n” from the 0nob mar0ob mar0ed :?ed :?ateater” and attr” and attach it bac0 to tach it bac0 to thehe 0nob mar0ed :%2” on the panel.
0nob mar0ed :%2” on the panel. h
h %lo%lose thse the )ale )al)e on )e on the tthe test cest cell mell mar0ar0ed :%ed :%2”.2”. i
i Use the Use the 0nob i0nob in the :n the :$et 2re$et 2ressure %ssure %ontroontrol” panl” panel to inel to increase crease the prthe pressure essure to the to the desiredesiredd cell pressure le)el. +onitor the cell pressure box in the ,$> software window to
cell pressure le)el. +onitor the cell pressure box in the ,$> software window to get theget the
accurate reading. accurate reading. <
< $et the :-urette58nnulus 6nput %ontrol” )a$et the :-urette58nnulus 6nput %ontrol” )al)e to :2ressure” position.l)e to :2ressure” position. 0
0 $lowly o$lowly open the )alpen the )al)e on the tes)e on the test cell mar0et cell mar0ed :%2”. Td :%2”. This will tranhis will transfer the cesfer the cell pressull pressure tore to the water inside the glass cylinder.
the water inside the glass cylinder. l
l 6n the ,$6n the ,$> softw> software windare window ow select thselect the righe right :+atert :+aterial Tial Tyype” to thpe” to the right se right side of thide of thee window and clic0 on the button :calculate =ate of $train”.
window and clic0 on the button :calculate =ate of $train”. m
m 6nput the 6nput the :%alculated rate o:%alculated rate of displacement” )af displacement” )alue from tlue from the computer she computer screen to displaycreen to display window at the bottom of the test cell and press Lnter .
window at the bottom of the test cell and press Lnter .
666.
666. %alculate %alculate 7ogger 7ogger $ampling $ampling =ates =ates (based (based on on percentage percentage of of length length of of specimen specimen at at failureAfailureA a
a /n the ,$> /n the ,$> software windowsoftware window fill fill up the boup the boxes mar0ed :xes mar0ed :first increments” :upto”first increments” :upto” and and :second increments”. This is the increment at which the result will be
:second increments”. This is the increment at which the result will be captured by thecaptured by the transducer. T
transducer. The default )alues are he default )alues are from the 8$T+ $tandard. $et both for .1.from the 8$T+ $tandard. $et both for .1.
6'
6'.. =eset =eset @orce @orce Transducer Transducer M M -ring -ring 2iston 2iston <ust <ust into into contact contact with with top top capAcapA a
a =aise th=aise the sample sample using the using the 0ey N on e 0ey N on the 0eythe 0eypad on tpad on the loadhe loading framing frame until the until the load pie load pistonston <ust touches the top notch of the top plate abo
<ust touches the top notch of the top plate abo)e the soil sample.)e the soil sample. b
b /n the ,$> software window /n the ,$> software window clic0 on the red button mar0ed :=clic0 on the red button mar0ed :=eset @orce Transducereset @orce Transducer”.”. c
c This shouThis should reset thld reset the lower rige lower right windoht window on the :Tw on the :Test +onest +onitorinitoring ?ig ?indow” in thndow” in the ,$>e ,$> software to . lbf
software to . lbf
'
'.. =eset =eset 8xial 8xial ,isplacement ,isplacement M M $tart $tart %ompression %ompression at at Lnd Lnd of of %ount %ount ,ownA,ownA a
a 2lace the :a2lace the :axial dispxial displacemelacement transdnt transducer” boucer” bottom touttom touching thching the hori&oe hori&ontal rod antal rod and clic0 ond clic0 onn the button :=eset 8xial ,isplacement Transducer” on the ,$> software window.
the button :=eset 8xial ,isplacement Transducer” on the ,$> software window. b
b This should reset lower left window on the :TThis should reset lower left window on the :Test +onitoring” window of thest +onitoring” window of the ,$>e ,$> software to . inches.
software to . inches. '6.
'6. %li%lic0 on tc0 on the grhe green :een :concontinutinue” bue” buttotton at thn at the bote bottom otom of the pf the page oage of the sf the softoftwarware wine windowdow.. '66
'66.. 8 w8 windindow wiow will appll appear tear that what will inill instrstruct yuct you to prou to press eness enter (Gter (Greereen -utn -uttonton to sta to start thrt the Tee Testst %ountdown. 6f e)erything is ready clic0 on the green button : $
%ountdown. 6f e)erything is ready clic0 on the green button : $ tart Tetart Test %ountdown”.st %ountdown”. '66
'666.6. /nc/nce the te the two whwo whistlistles goes go pre press the gss the greereen bun button tton :=u:=un” on tn” on the 0eyhe 0eypad apad at the bt the bottottom of tom of the tehe testst cell.
cell.
J!
J! TTO SO STOTOP P THTHE TE TESESTT 1.
1. To To stop the lostop the loading at aading at any time preny time press red butss red button :$topton :$top” on the 0ey” on the 0eypad of the lopad of the load framad frame.e. !.
3.
3. %li%lic0 on c0 on butbutton :ton :$ta$tart Trt Tesest $tagt $tage” bue” buttotton.n. 4.
4. $el$elect :ect :@in@inal +eal +easuasuremrementents” ans” and cld clic0 oic0 on /I n /I .
. LntLnter all per all paraarametmeters thers that arat are a)ae a)ailabilable at thle at this timis timee @inal $pecimen weight (wet
@inal $pecimen weight (wet @inal $pecimen
@inal $pecimen ?e?eight (,ryight (,ry 6nitial +oisture %ontent
6nitial +oisture %ontent from Trimmingsfrom Trimmings 7ab Temp
7ab Temperature during erature during testtest
2article $pecific Gra)ity 2article $pecific Gra)ity
#.
#. %lic0 on green button :%onfirm ,ata”.%lic0 on green button :%onfirm ,ata”.
.
. %lic0 :/I” on %lic0 :/I” on the window stating the window stating :@6;87 $T:@6;87 $T8GL 6$ ;/? %/+27LTL.8GL 6$ ;/? %/+27LTL. 2=L$$ /
2=L$$ /I T/ $T/=L I T/ $T/=L TJL TL$T ,TJL TL$T ,8T8T8 =L8,K @/= 8;87K8 =L8,K @/= 8;87K$6$ $6$ /=/= 2=L$$$ %8;%L7 T/ 2L=@=/+ @U=TJL= $T8GL$”
2=L$$$ %8;%L7 T/ 2L=@=/+ @U=TJL= $T8GL$”
".
". $a)e the =aw data obtained from the test to a directory of your choice. The$a)e the =aw data obtained from the test to a directory of your choice. The software will prompt to a default directory.
software will prompt to a default directory.
9.
9. %lic0 on button :exit” to exit from the software.%lic0 on button :exit” to exit from the software.
K!
K! DRADRAINIINING NG THTHE CEE CELLLL 1.
1. TuTurn the :$et 2rrn the :$et 2ressure %oessure %ontrol” 0nntrol” 0nob in counob in counter>cter>cloc0wloc0wise directiise direction to reduon to reduce thece the cell pressure.
cell pressure. !.
!. TuTurn the :-urrn the :-urette58nette58nnulus 6nnulus 6nput %onput %ontrol” )altrol” )al)e to :-rid)e to :-ridge /ff” poge /ff” positionsition.. 3.
3. /pen t/pen the top he top 0nob 0nob of the of the glass cyglass cylinder linder in the in the load ceload cell assembll assembly.ly. 4.
4. $et th$et the :-ure :-urette58nette58nnulunulus @low s @low %ontr%ontrol” to ol” to :drain:drain” posi” position.tion. .
. /pen th/pen the )al)e oe )al)e on the test mn the test mar0ed :%ar0ed :%22. . This wThis will drain ill drain the watethe water from the gr from the glasslass cylinder.
cylinder.
L!
L! DIDIS#AS#ANTLNTLING ING THTHE CE CELLELL 1.
1. Use the bUse the button O utton O on the 0on the 0eypad oeypad of the load f the load frame to lframe to lower the saower the sample awmple away fromay from the load piston.
the load piston. !.
!. UnscreUnscrew the thw the three rodree rods from ts from the sidhe sides of thes of the glass cye glass cylinder linder and ta0and ta0e out te out thehe cylinder.
cylinder. 3.
3. ,isman,ismantle the samtle the sample from tple from the test celhe test cell and secul and secure the memre the membrane tbrane top and bop and bottomottom end plates. end plates.
